4
KDC-W237AY/W237GY/W3037AY/W3037GY/
W311AY/W311GY/W3537AY/W3537GY/W4037Y
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ELECTRIC UNIT (X34-467x-xx)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
System
µ
-COM
Controls FM/AM tuner, the changer, CD mechanism, panel, volume and tone.
IC2,3
E-VOL
Controls the source, volume and tone.
IC4
Power Supply IC
Outputs 5Vx2, 8.1Vx2, 10.2V, P-CON and P-ANT.
IC6
Power IC
Amplifies the front L/R and the rear L/R to 50W or 45W maximum.
IC7
RDS IC
RDS decoder.
IC8
Reset IC
Lo when detection voltage goes below 3.6V.
IC9
Analog SW
Multiplex triple 2-channel analog SW.
Q1
SW14V
ON when the base goes Hi.
Q2
Servo+B AVR
When Q3’s base goes Hi, Servo+B AVR outputs 7.5V.
Q3
Control SW for Servo+B
ON when the base goes Hi.
Q7
VFD+B SW
ON when the base goes Hi.
Q8
VFD+B AVR
When Q9’s base goes Hi, Servo+B AVR outputs 10.5V.
Q9
Control SW for VFD+B
ON when the base goes Hi.
Q101
ACC DET
ON when the base goes Hi during ACC is applied.
Q102
Serge DET
When the base goes Hi, surge voltage is detected.
Q103
BU DET
ON when the base goes Hi during BU is applied.
Q104,105
Mute Control
ON when the base goes Hi.
Q301
Panel 5V SW
ON when the base goes Lo.
Q302
DSI ILLUMI SW
ON when the base goes Hi.
Q401
IC9 Control SW
Switches to AUX when the base goes Hi, and switches to LX-BUS (CD-CH) when the base goes Lo.
Q402
Quick Charge Voltage SW
Charges voltage quickly when the base goes Hi.
Q701,702
Pre-out Mute SW
When a base of the 4 transistors goes Hi, pre-out is muted.
Q705
Mute Driver for Pre-out
ON when the base goes Lo.
Q901
DC Offset DET
ON when the base goes Hi after Q902’s and Q903’s outputs are separated.
Q902,903
DC Offset DET SW
ON when the bases go Lo after IC6’s SP-OUTs (DC) are separated.
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SWITCH UNIT (X16-386x-xx)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
VFD Driver
IC3
Remote Control Sensor
Q1
GREEN LED SW
ON when the base goes Hi.
Q2
RED LED SW
ON when the base goes Hi.
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CD PLAYER UNIT (X32-5970-00)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC3
4ch BTL Driver
Driver for focusing & tracking coil, driver for sled & spindle motor, and operation for disc
loading & ejection.
IC4
Servo DSP with built-in Audio DAC
With built-in MP3/WMA/AAC decoder and 1M-bit-SRAM.
IC5
D1.5V REG.
Power supply for digital 1.5V.
COMPONENTS DESCRIPTION